iPod Linux framebuffer support.

--ryan.


Date: Sun, 19 Jun 2005 15:53:22 -0700
From: Joshua Oreman <oremanj@gmail.com>
To: sdl@libsdl.org
Subject: [SDL] [PATCH] iPod framebuffer video driver

Hi SDL-list,

I've been working on a port of SDL to iPodLinux
(http://www.ipodlinux.org).  I've created a patch for both the
standard 2-bit iPod screen (using an unchangeable palette) and the
16-bit iPod photo.  The patch is attached, against version 1.2.8.

I've created two pages on the iPodLinux wiki about this patch:
http://www.ipodlinux.org/Building_SDL and
http://www.ipodlinux.org/SDL_Programming. See those pages if you're
curious.

Comments? Questions? Is this something that might be able to get into SDL 1.2.9?

Thanks for your feedback!
-- Josh

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401143

configure.in

@@ -549,6 +549,20 @@ CheckNASM()
     fi
 }
 
+dnl Do the iPod thing
+CheckIPod()
+{
+    AC_ARG_ENABLE(ipod,
+[  --enable-ipod          configure SDL to work with iPodLinux [default=yes on arm-elf]],
+	, enable_ipod=yes)
+
+    if test x$enable_ipod = xyes; then
+	CFLAGS="$CFLAGS -DENABLE_IPOD -DIPOD"
+	VIDEO_SUBDIRS="$VIDEO_SUBDIRS ipod"
+	VIDEO_DRIVERS="$VIDEO_DRIVERS ipod/libvideo_ipod.la"
+    fi
+}	
+
 dnl Find the nanox include and library directories
 CheckNANOX()
 {
@@ -1306,7 +1320,7 @@ CheckPTHREAD()
             pthread_lib="-lpthread"
             ;;
     esac
-    if test x$enable_threads = xyes -a x$enable_pthreads = xyes; then
+    if test x$enable_threads = xyes -a x$enable_pthreads = xyes -a x$enable_ipod != xyes; then
         # Save the original compiler flags and libraries
         ac_save_cflags="$CFLAGS"; ac_save_libs="$LIBS"
         # Add the pthread compiler flags and libraries
@@ -1932,6 +1946,15 @@ CheckRPATH()
 }
 
 case "$target" in
+    arm-*-elf*)
+	ARCH=linux
+	CheckDummyVideo
+	CheckIPod
+	# Set up files for the timer library
+        if test x$enable_timers = xyes; then
+            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
+        fi
+	;;
     *-*-linux*|*-*-gnu*|*-*-k*bsd*-gnu)
         case "$target" in
           *-*-linux*) ARCH=linux ;;
@@ -2810,6 +2833,7 @@ AM_CONDITIONAL(TARGET_MACOS, test $ARCH = macos)
 AM_CONDITIONAL(TARGET_MACOSX, test $ARCH = macosx)
 AM_CONDITIONAL(TARGET_QNX, test $ARCH = qnx)
 AM_CONDITIONAL(TARGET_MINT, test $ARCH = mint)
+AM_CONDITIONAL(TARGET_IPOD, test x$enable_ipod = xyes)
 
 # More automake conditionals
 AM_CONDITIONAL(USE_DIRECTX, test x$use_directx = xyes)
@@ -2989,6 +3013,7 @@ src/video/epoc/Makefile
 src/video/fbcon/Makefile
 src/video/gem/Makefile
 src/video/ggi/Makefile
+src/video/ipod/Makefile
 src/video/maccommon/Makefile
 src/video/macdsp/Makefile
 src/video/macrom/Makefile

src/events/SDL_events.c

@@ -181,7 +181,9 @@ static void SDL_StopEventThread(void)
 		SDL_EventThread = NULL;
 		SDL_DestroyMutex(SDL_EventLock.lock);
 	}
+#ifndef IPOD
 	SDL_DestroyMutex(SDL_EventQ.lock);
+#endif
 }
 
 Uint32 SDL_EventThreadID(void)

src/events/SDL_sysevents.h

@@ -37,6 +37,10 @@ static char rcsid =
 #define CANT_THREAD_EVENTS
 #endif
 
+#ifdef IPOD			/* iPod doesn't support threading at all */
+#define CANT_THREAD_EVENTS
+#endif
+
 #ifdef macintosh	/* MacOS 7/8 don't support preemptive multi-tasking */
 #define CANT_THREAD_EVENTS
 #endif

src/video/SDL_cursor.c

@@ -74,7 +74,9 @@ void SDL_CursorQuit(void)
 int SDL_CursorInit(Uint32 multithreaded)
 {
 	/* We don't have mouse focus, and the cursor isn't drawn yet */
+#ifndef IPOD
 	SDL_cursorstate = CURSOR_VISIBLE;
+#endif
 
 	/* Create the default cursor */
 	if ( SDL_defcursor == NULL ) {

src/video/SDL_sysvideo.h

@@ -341,6 +341,9 @@ extern VideoBootStrap DGA_bootstrap;
 #ifdef ENABLE_NANOX
 extern VideoBootStrap NX_bootstrap;
 #endif
+#ifdef ENABLE_IPOD
+extern VideoBootStrap iPod_bootstrap;
+#endif
 #ifdef ENABLE_FBCON
 extern VideoBootStrap FBCON_bootstrap;
 #endif

src/video/SDL_video.c

@@ -57,6 +57,9 @@ static VideoBootStrap *bootstrap[] = {
 #ifdef ENABLE_NANOX
 	&NX_bootstrap,
 #endif
+#ifdef ENABLE_IPOD
+	&iPod_bootstrap,
+#endif
 #ifdef ENABLE_QTOPIA
 	&Qtopia_bootstrap,
 #endif

src/video/ipod/Makefile.am

+
+## Makefile.am for SDL using the iPod framebuffer driver
+
+noinst_LTLIBRARIES = libvideo_ipod.la
+libvideo_ipod_la_SOURCES = SDL_ipodvideo.c SDL_ipodvideo.h

src/video/ipod/SDL_ipodvideo.h

+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2004 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+/* iPod SDL framebuffer driver
+ * Joshua Oreman
+ * Main header file
+ */
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#ifndef _SDL_ipodvideo_h
+#define _SDL_ipodvideo_h
+
+struct SDL_PrivateVideoData {
+    char *buffer;
+    int w, h;
+};
+
+
+#endif